Improvement in stop-motions for steam-engine governors



- Patented June 9,1874;

v T WARREN Stop-Motions for Steam-Engine Governors.

UNITED STATES PATENT OFFICE.

THOMAS VARREN, OF FLINT, MICHIGAN.

IMPROVEMENT IN STOP-MOTIONS FOR STEAM-ENGlNE GOVERNORS.

Specification forming part of Letters Patent No. 15 1,940, dated J nne9, 1874; application filed April 14, 1874.

To all whom '1' t may concern Be it known that I, THOMAS VARREN, ofFlint, in the county of Geuesec and State of Michigan, have invented anImprovement in Stop-Motion for Steam-Engine Governors, of which thefollowing is a specification:

The first part of this invention relates to the construction ofagovernor in such a manner that, when the driving-belt breaks or runsoff the pulley, the head, with the arms, will drop and carry down thespindle far enough to have the valve close the steam-ports, and thusstop the engine. The second part of the invention relates to thepeculiar method of hanging a counter-shaft, if one be used in connectionwith the governor, whereby, it the belt from the engineshaft to thecounter-shaft breaks or runs 011', the engine will be instantly stoppedby the dropping 01' the governor-spindle, as above specified.

Figure 1 is a perspective view of my improved governor aud stop-motionas applied to the governor and counter-shaft, showing the positions ofthe various parts when the belt which drives the counter-shaft isbroken. Fig. 2 is a sectional elevation at w a: in Figs. 1 and 3, thelatter being a cross-section at y y in Fig. 2. r

In the drawing, A represents the cap of the governor valve-case, onwhich is erected the open f'aine B, terminating at the top in a verticalsleeve, 13, in which is inserted the vertical arm 0, of an L-shapedsleeve, whose horizontal arm C is connected therewith by a shell, C allbeing cast in one piece. D is the rotating head, having a tubular stem,which is passed down through the sleeve 0, carrying at its lower end thebevel-pinion a. E are the weighted arms, hung in the frame of the head,their inner ends engaging with the spool on the upper part of thevalve-stem 1*. The base of the head-frame rests upon the top of thesleevearm U. G is the driving-shaft of the governor, rotating in thesleeve 0, which forms its bearing. At its inner end isabcvclgear, I),meshing with the pinion a to give the head its rotary movement. H is thedrivingpulley on the outer end of the shaft G. The frame B has twohorizontal brackets, B on opposite sides, in either of which the arm 0may be placed, so that the same governor will answer for eitherright-hand or left-hand connectcd engines; but one bracket is necessary,however, if the governor be specially made for either s yle ofconnection. The bracket is bored, like a half of a box, for the arm C,which has sleeved on its inner parta collar, I, having a wedge-shapedstud, e, on its bottom, which rests upon the flat top of the framebase Bto support the arm-sleeve C in a horizontal position. Unless someextraneous force were applied to either the arm 0 directly or to itthrough the collar I, the latter would fall forward out or" the bracketand carry the arm with it, as seen in Fig. 1, and lower the spindle farenough to have the valve close the ports. As a temporary device forsustaining the parts in position, 1 bolt a plate, J, to the face of theframe-base, and pivot in its head a stop, (I, which may be thrown overagainst the collar, and so keep it in the bracket. This stop should bethrown away from the collar when the governor is in running order, sothat, in case the belt which drives the governor breaks or runs off thepulley, the arm C' will drop out of the bracket and close the ports. 7

It frequently becomes necessary in practice to drive the governor from acounter-shaft overhead, instead of by a belt from the crankshaft of theengine. belt which drives the counter-shaft breaks or runs 011', thegovernor would let the engine race, and, perhaps, cause great damage andendanger the lives of those in its vicinity. To overcome this diflicultyis the object of the second part of my invention, in which- K representsa frame pendent from the engine-room ceiling. In this frame is a slidingtightener-frame, L, which may be raised and lowered by a screw, M,passing through a girt in the frame K. N is a shaft, journaled inprojecting bearings across the frame L. To each end of this shaft issecured a pendent arm, 0, and through the lower ends of these arms thecountershaft P is journaled, with a pulley, H, on one end, and another,11, on

the other. Around this latter a belt, 0, passes from the engine-shaft,and over the pulleys H H an endless belt, 6, runs, so that thecountershat't is like a pendulum, held stationary by the. opposingstrains of the two belts. It the In such a case, if the belt a breaks orruns off the pulleys the arm (l will drop out of the bracket and stopthe engine. In like manner, if the belt 0 breaks or runs off, the arm Cwill drop out of the bracket, pulling forward the counter-shaft, as seenin Fig.1. The screw 11' serves to tighten the endless belts by drawing,up the frame L.

\Vhat 1 claim as my invention, and desire to secure by Letters Patent,is

1. The L-shaped sleeve 0 C C forming bearings for the head I), and theshaft G, and the collar I, in combination with the frame B and bracketB, substantially as and for the purpose set forth.

2. The combination, with the shaft G, arranged as described, of thecounter-shaft P, suspended by the radius-arms 0 from the shaft N,L-shapcd sleeve, and bracket B", substantially as and for the purposeset forth.

I THOMAS WARREN.

\itnesses H. F. EDI-Jars, (J. E. HL'ESTIS.

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